Downloading 4.16.3, but keeps freezing up
 

I have had to uninstall Limewire Pro 4.14.??. I've tried to reinstall Pro 4.16.13, but it gets stuck when it starts " removing Previous versions of limewire"/ execute:"G:unsnitall.exe"/S . I also get NSIS Error : Error launching installer. Anyone have a clue?[/

How did you uninstall the older version ???

If you did it via Add/Remove programs then that can cause problems!!
The correct way to uninstall is Start > All programs > Limewire/Uninstaller

Use your computer's search to look for all files & folders with limewire in the name. If you can't delete them, reboot into safe mode & then try. If they still won't delete, try one of the tools here...
Incomplete Download File won't delete at all.

Try that and then try re-installing the latest version....